I am attempting to unlock my S6 and having issues. Sprint phone reps are telling me it is unlocked. With a Sprint SIM in, the UICC unlock fails (Error 407). With a T-Mobile SIM in, I get Invalid SIM card. Any suggestions?
It sounds like the unlock signal was sent, but the unlock wasn't successful. To ensure a successful unlock. the Sprint SIM needs to be in the phone, it needs to be connected to WiFi, and it needs to stay powered on while the ticket is being worked and the signal is being sent.
I can submit another unlock request for you. I'll need to get some info. I'm going to send you a private message.
RedCruzr Social Care Queen of Unlocks and Billing Questions. Samsung for Life!! Kudos and Accepted Solutions are welcomed and appreciated.